Common materials for door closers include aluminum alloy, stainless steel, and zinc alloy. For some special applications, copper, cast iron, or plastic may also be used. Different materials determine the durability, applicable scenarios, and price of the door closer. Aluminum alloy is often chosen for general household or commercial use, while stainless steel is recommended for humid or heavy-duty environments.
Aluminum Alloy: This is currently the most common material. Its advantages include light weight, ease of processing, and a variety of colors and styles. Many fire-fighting door closers use this material.
Stainless Steel: Primarily known for its durability and rust resistance, especially 304 stainless steel. It is suitable for humid or high-hygiene environments such as hospitals, canteens, and beaches.
Zinc Alloy: Lower cost. Many cheap zinc alloy door closers on the market are copper-plated; be careful not to be misled into thinking they are made entirely of copper.
Copper and Cast Iron: Pure copper door closers are generally vintage-style custom designs and are very expensive; cast iron is very sturdy and is often used for heavy-duty fire doors or factory gates.